Document Detail


On-line chemical generation of tris(2,2'-bipyridyl)ruthenium(III) and its application in CE with chemiluminescence detection.
MedLine Citation:
PMID:  17703469     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A novel tris(2,2'-bipyridyl)ruthenium(III) [Ru(bipy)(3) (3+)]-based chemiluminescence (CL) detection in CE using an on-line chemical generation scheme has been demonstrated. Two continuous streams respectively containing solutions of Ru(bipy)(3) (2+) and acidic cerium(IV) used as a homogeneous chemical oxidant are employed to generate Ru(bipy)(3) (3+), which is delivered into the reaction capillary of a coaxial flow interface and then reacted with analytes at the end of the separation capillary to yield light. The important operational parameters for separation and detection are identified and optimized. Four alpha-ketocarboxylic acids used as models, outside of the amine-containing compounds, are successfully separated and detected to evaluate the feasibility of the approach. The excellent resolution and detection sensitivity was achieved by using 50 mmol/L phosphate running buffer (pH 9.5) with 0.7 mmol/L CTAB, and CL reagent solution streams containing 0.15 mmol/L Ru(bipy)(3) (2+) and 0.8 mmol/L cerium(IV) (0.25 mol/L H(2)SO(4)), respectively. The concentration detection limits for alpha-ketocarboxylic acids were below 3.7x10(-8) mol/L (S/N = 3). The proposed method was applied to the determination of alpha-ketocarboxylic acids in five different honey samples with satisfactory results.
Authors:
Xinghu Ji; Zhike He; Daiwen Pang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Electrophoresis     Volume:  28     ISSN:  0173-0835     ISO Abbreviation:  Electrophoresis     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-09-24     Completed Date:  2007-11-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8204476     Medline TA:  Electrophoresis     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  3260-7     Citation Subset:  IM    
Affiliation:
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, PR China.
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MeSH Terms
Descriptor/Qualifier:
Electrophoresis, Capillary / methods*
Luminescence
Organometallic Compounds / chemistry*
Chemical
Reg. No./Substance:
0/Organometallic Compounds; 0/tris(2,2'-bipyridyl)ruthenium(II)

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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